Il

Video Single output Transform

Deinterleave or interleave fields.

FFmpeg filter: il — the official reference.

Add it to a graph. The explicit form works for every filter — bind it to its input and read the result from outputs():

$node   = $video->addFilter(new Il(…));
$result = $node->outputs()[0];

Shorthand. Single-output filters can skip the node — apply() returns the result stream directly:

$result = $video->apply(new Il(…));

When to use it

TODO — when this filter shines: what it’s the right tool for, what to reach for instead when it isn’t, and how it composes with neighbouring filters.

How to use it

TODO — prose: how the filter actually works and what its key parameters mean (the explanation FFmpeg’s terse option help omits).

Examples

TODO — runnable PHP, with the equivalent ffmpeg CLI alongside.

Gotchas

TODO

See also

TODO

Parameters

Parameter	Type	Default	Range / values	Description
luma_mode	IlLumaMode	none	none, interleave, deinterleave	select luma mode
chroma_mode	IlChromaMode	none	none, interleave, deinterleave	select chroma mode
alpha_mode	IlAlphaMode	none	none, interleave, deinterleave	select alpha mode
luma_swap	bool	false	—	swap luma fields
chroma_swap	bool	false	—	swap chroma fields
alpha_swap	bool	false	—	swap alpha fields

FFmpeg also names these options (use the parameter shown above): l → luma_mode, c → chroma_mode, a → alpha_mode, ls → luma_swap, cs → chroma_swap, as → alpha_swap.

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Maps to FFmpeg’s il filter. Verified against ffmpeg n7.1.1.